1/*	$NetBSD: lm_isa_common.c,v 1.7 2020/06/24 19:11:49 jdolecek Exp $ */
2
3/*-
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Bill Squier.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: lm_isa_common.c,v 1.7 2020/06/24 19:11:49 jdolecek Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/device.h>
39#include <sys/module.h>
40#include <sys/conf.h>
41#include <sys/kmem.h>
42
43#include <sys/bus.h>
44
45#include <dev/isa/isareg.h>
46#include <dev/isa/isavar.h>
47
48#include <dev/ic/nslm7xvar.h>
49
50int 	lm_isa_match(device_t, cfdata_t, void *);
51void 	lm_isa_attach(device_t, device_t, void *);
52int 	lm_isa_detach(device_t, int);
53
54static uint8_t 	lm_isa_readreg(struct lm_softc *, int);
55static void 	lm_isa_writereg(struct lm_softc *, int, uint8_t);
56
57struct lm_isa_softc {
58	struct lm_softc lmsc;
59	bus_space_tag_t lm_iot;
60	bus_space_handle_t lm_ioh;
61};
62
63int
64lm_isa_match(device_t parent, cfdata_t match, void *aux)
65{
66	bus_space_handle_t ioh;
67	struct isa_attach_args *ia = aux;
68	struct lm_isa_softc *sc;
69	int rv;
70
71	/* Must supply an address */
72	if (ia->ia_nio < 1)
73		return 0;
74
75	if (ISA_DIRECT_CONFIG(ia))
76		return 0;
77
78	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
79		return 0;
80
81	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0, &ioh))
82		return 0;
83
84	/* Bus independent probe */
85	sc = kmem_zalloc(sizeof(*sc), KM_SLEEP);
86	sc->lm_iot = ia->ia_iot;
87	sc->lm_ioh = ioh;
88	sc->lmsc.lm_writereg = lm_isa_writereg;
89	sc->lmsc.lm_readreg = lm_isa_readreg;
90	rv = lm_match(&sc->lmsc);
91	kmem_free(sc, sizeof(*sc));
92
93	bus_space_unmap(ia->ia_iot, ioh, 8);
94
95	if (rv) {
96		ia->ia_nio = 1;
97		ia->ia_io[0].ir_size = 8;
98
99		ia->ia_niomem = 0;
100		ia->ia_nirq = 0;
101		ia->ia_ndrq = 0;
102	}
103
104	return rv;
105}
106
107
108void
109lm_isa_attach(device_t parent, device_t self, void *aux)
110{
111	struct lm_isa_softc *sc = device_private(self);
112	struct isa_attach_args *ia = aux;
113
114	sc->lm_iot = ia->ia_iot;
115
116	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0,
117	    &sc->lm_ioh)) {
118		aprint_error(": can't map i/o space\n");
119		return;
120	}
121
122	/* Bus-independent attachment */
123	sc->lmsc.sc_dev = self;
124	sc->lmsc.lm_writereg = lm_isa_writereg;
125	sc->lmsc.lm_readreg = lm_isa_readreg;
126	/* pass wbsio Device ID */
127	sc->lmsc.sioid = (uint16_t)(uintptr_t)ia->ia_aux;
128
129	lm_attach(&sc->lmsc);
130}
131
132int
133lm_isa_detach(device_t self, int flags)
134{
135	struct lm_isa_softc *sc = device_private(self);
136
137	lm_detach(&sc->lmsc);
138	bus_space_unmap(sc->lm_iot, sc->lm_ioh, 8);
139	return 0;
140}
141
142static uint8_t
143lm_isa_readreg(struct lm_softc *lmsc, int reg)
144{
145	struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
146
147	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
148	return bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA);
149}
150
151static void
152lm_isa_writereg(struct lm_softc *lmsc, int reg, uint8_t val)
153{
154	struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
155
156	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
157	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
158}
159
160MODULE(MODULE_CLASS_DRIVER, lm_isa_common, "lm");
161
162static int
163lm_isa_common_modcmd(modcmd_t cmd, void *priv)
164{
165	if ((cmd == MODULE_CMD_INIT) || (cmd == MODULE_CMD_FINI))
166		return 0;
167	return ENOTTY;
168}
169